codicil vs epilogue

codicil

noun
  • An addition or supplement modifying any official document, such as a treaty. 

  • An addition or supplement that explains, modifies, or revokes a will or part of one. 

  • Any appendix or addition. 

verb
  • To add a codicil to something. 

epilogue

noun
  • A brief oration or script at the end of a literary piece; an afterword 

  • A short speech, spoken directly at the audience at the end of a play 

  • A component of a computer program that prepares the computer to return from a routine. 

  • The performer who gives this speech 

verb
  • To conclude with an epilogue. 

How often have the words codicil and epilogue occurred in a corpus of books? (source: Google Ngram Viewer )